Handle dry-run issues more graceful

[thepiwo]

e.g.

May 15, 2023 @ 00:02:54.024 | /app/src/canvas.js:153
  | May 15, 2023 @ 00:02:54.024 | at runMicrotasks (<anonymous>)
  | May 15, 2023 @ 00:02:54.024 | at async Timeout.intervalJob [as _onTimeout] (/app/src/canvas.js:28:5)
  | May 15, 2023 @ 00:02:54.024 |  
  | May 15, 2023 @ 00:02:54.024 | TypeError: Cannot read properties of undefined (reading 'sort')
  | May 15, 2023 @ 00:02:54.024 | at Object.canvas.render (/app/src/canvas.js:153:10)
  | May 15, 2023 @ 00:02:54.024 | at processTicksAndRejections (node:internal/process/task_queues:96:5)
  | May 15, 2023 @ 00:02:54.024 | ^
  | May 15, 2023 @ 00:02:54.023 | "streamResponseStatusCodes": {},
  | May 15, 2023 @ 00:02:54.023 | "requestId": "baff5f87-fa12-4ab7-9597-742bd8f663cb",
  | May 15, 2023 @ 00:02:54.023 | "enableBrowserStreams": false
  | May 15, 2023 @ 00:02:54.023 | TypeError: Cannot read properties of undefined (reading 'decodedResult')
  | May 15, 2023 @ 00:02:54.023 | },
  | May 15, 2023 @ 00:02:54.023 | "message": "v3/dry-run error: Temporary overload"
  | May 15, 2023 @ 00:02:54.023 | at processTicksAndRejections (node:internal/process/task_queues:96:5)
  | May 15, 2023 @ 00:02:54.023 | at async Object.canvas.render (/app/src/canvas.js:149:26)
  | May 15, 2023 @ 00:02:54.023 | "disableKeepAlive": false,
  | May 15, 2023 @ 00:02:54.023 | "withCredentials": false,
  | May 15, 2023 @ 00:02:54.023 | "allowInsecureConnection": true,
  | May 15, 2023 @ 00:02:54.023 | "details": {},
  | May 15, 2023 @ 00:02:54.023 | "method": "POST",
  | May 15, 2023 @ 00:02:54.023 | }
  | May 15, 2023 @ 00:02:54.023 | at runMicrotasks (<anonymous>)
  | May 15, 2023 @ 00:02:54.023 | at async Timeout.intervalJob [as _onTimeout] (/app/src/canvas.js:28:5)
  | May 15, 2023 @ 00:02:54.023 | "timeout": 0,
  | May 15, 2023 @ 00:02:54.023 | at Object.blockchain.auctionSlots (/app/src/blockchain.js:46:21)
  | May 15, 2023 @ 00:02:54.022 | "url": "https://mainnet.aeternity.io/v3/dry-run?int-as-string=REDACTED",
  | May 15, 2023 @ 00:02:54.022 | "user-agent": "azsdk-js-node/1.0.0-beta.1 core-rest-pipeline/1.10.0 Node/v16.18.1 OS/(x64-Linux-5.4.156-83.273.amzn2.x86_64)",
  | May 15, 2023 @ 00:02:54.022 | "content-type": "application/json",
  | May 15, 2023 @ 00:02:54.022 | "accept": "application/json",
  | May 15, 2023 @ 00:02:54.022 | "x-ms-client-request-id": "baff5f87-fa12-4ab7-9597-742bd8f663cb",
  | May 15, 2023 @ 00:02:54.022 | "headers": {
  | May 15, 2023 @ 00:02:54.022 | "request": {
  | May 15, 2023 @ 00:02:54.022 | "accept-encoding": "gzip,deflate",
  | May 15, 2023 @ 00:02:54.022 | "content-length": "279"
  | May 15, 2023 @ 00:02:54.022 | },
  | May 15, 2023 @ 00:02:54.021 | "statusCode": 503,
  | May 15, 2023 @ 00:02:54.021 | RestError: v3/dry-run error: Temporary overload
  | May 15, 2023 @ 00:02:54.021 | {
  | May 15, 2023 @ 00:02:54.021 | "name": "RestError",